22’’ LCD TV AOC L22W631
19
5. Repair Flow Chart
1. No Power (No LED indicator)
Check CN902 Pin
1/2 = 12V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C905 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin 8 of IC901
Check R904, R932, R933 or Change IC901
Check the auxiliary voltage is bigger than
10V and smaller than 20V
1) Check IC901, T901
2) Check C908, D902 circuit
OK
OK
NG
Check
D904/D906/Q903/ZD920/IC903/IC902
Check IC901 pin 6 PWM wave
OK
Check IC901, Q901
NG
NG
NG
OK
NG
NG
OK
Summary of Contents for L22W631
Page 17: ...22 LCD TV AOC L22W631 17 4 Remove the shield 5 Remove the main board power board ...
Page 25: ...22 LCD TV AOC L22W631 25 6 PCB Layout 6 1 Main Board ...
Page 26: ...22 LCD TV AOC L22W631 26 ...
Page 27: ...22 LCD TV AOC L22W631 27 ...
Page 28: ...22 LCD TV AOC L22W631 28 6 2 Power Board ...
Page 29: ...22 LCD TV AOC L22W631 29 ...
Page 30: ...22 LCD TV AOC L22W631 30 6 3 Tuner Board 6 4 IR Board ...